That French women are effortlessly stylish isn’t a new idea to anyone, but as our Paris-born model Rebecca Dayan (that’s her, above) told us, it’s not entirely true. That lived-in dishabille is no accident—it’s basically heirloom style that’s passed down from grandmothers to moms to daughters. And our latest collaboration with Sézane wouldn’t be complete without four of those timeless styles that each generation’s lived in. But how’d these pieces reach icon status? And how are we wearing them now? To learn about their origins, we stopped by the Metropolitan Museum of Art’s Costume Institute collection (a massive archive of clothes from throughout history) and then strolled over to our photo shoot in Central Park to find out more.